Relevant to our interests

[rydra_wong]

Arm and shoulder muscles animated diagram!

https://edgewitch.tumblr.com/post/158641920466/reillybrown-songbirde108-hamaonoverdrive

Also, new free book:

ACT: Adjunct Compensatory Training for Rock Climbers by Volker Schöffl, Dicki Korb and Patrick Matros (variously serious sports medicine and training experts) -- aimed at preventing/rehabbing injuries